seconder

English Thesaurus

1. someone who endorses a motion or petition as a necessary preliminary to a discussion or vote (noun.person)

hypernym	:	admirer, booster, champion, friend, protagonist, supporter,
definition	:	a person who backs a politician or a team etc. (noun.person)

derivation	:	back, endorse, indorse, second,
definition	:	give support or one's approval to (verb.social)

derivation	:	back, endorse, indorse, second,
definition	:	give support or one's approval to (verb.social)